Polysiloxane polyurethane compositions

Details Polysiloxane polyurethane compositions Polysiloxane polyurethane compositions

1997-03-10

1998-06-02

Niland, Patrick

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

525453, 525474, 528 12, 528 18, 528 25, C08G 7704, C08G 7706, C08F28304, C08F28300

Patent

active

057601550

ABSTRACT:
A polysiloxane polyurethane composition is prepared by combining in the presence of water and in a predetermined proportion an organic di- or polyisocyanate, a polyol, an hydroxyl-containing silicon material having the hydroxyl groups attached directly to a silicon atom, an organotin catalyst, an amine catalyst, a methoxy-functional silicone intermediate, and a carbinol. If desired, various different fillers, pigments, solvents, and additives for enhancing pigment wetting and flow control and the like can also be used to prepare the coating. The chemical ingredients are combined together to undergo chemical reaction to form silanol-functionalized urethane prepolymers that cure at ambient temperatures in the presence of moisture to form a polysiloxane polyurethane composition having enhanced properties of chemical and weather resistance, high tensile and tear strength, and high elongation.

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